If you are starting out in Azure then the AZ-900 Azure Fundamentals exam is the place to start and if you register for Microsoft Azure Virtual Training Day: Fundamentals through Microsoft Events you will receive a free exam voucher.
The Microsoft Azure Virtual Training Day: Fundamentals will improve your understanding of cloud concepts and offer the knowledge you need to earn the Microsoft Azure Fundamentals certification. Learn basic strategies for transitioning to the cloud along with concepts including security, high availability, scalability, elasticity, agility, fault tolerance, and disaster recovery.
- Module 0: Course Introduction
- Module 1: Cloud Concepts
- Module 2: Core Azure Services
- Module 3: Security, Privacy, Compliance, & Trust
- Module 4: Azure Pricing and Support
For additional training material I would recommend going through the Azure Fundamentals Learning Path on Microsoft Learn.
Good Luck and Let me know how you get on!